Study of AAV-GAD Gene Transfer Into the Subthalamic Nucleus for Parkinson's Disease
Summary
The purpose of this study is to determine the safety and efficacy of AAV-GAD gene transfer into the subthalamic nucleus (STN) region of the brain. This study involves the treatment of subjects with medically refractory Parkinson's disease (PD). The gene transfer product, a disabled virus with a gene called GAD, will be infused into the STN bilaterally using stereotactic surgical techniques. The overall goal of this approach is to normalize the activity of the STN and reduce the motor symptoms of PD. Because the change in UPDRS demonstrated a positive outcome, the sham surgery subjects from the blinded portion of the study will be invited to crossover into the Open-label Arm portion of the study. The Open-label Arm will further evaluate the safety and efficacy of AAV-GAD gene transfer into the subthalamic nucleus (STN) region of the brain.
Timeline
- Start
- 2008-08
- Primary completion
- 2010-12
- Completion
- —
Outcome
Met primary endpoint
Stopped (Business): “Due to financial reasons”
paper significantly greater improvement from baseline in UPDRS scores compared with the sham group over the 6-month course of the study (RMANOVA, p=0·04). PMID 21419704 ↗
Publications
- Background Kaplitt MG, Feigin A, Tang C, Fitzsimons HL, Mattis P, Lawlor PA, Bland RJ, Young D, Strybing K, Eidelberg D, During MJ. Safety and tolerability of gene therapy with an adeno-associated virus (AAV) borne GAD gene for Parkinson's disease: an open label, phase I trial. Lancet. 2007 Jun 23;369(9579):2097-105. doi: 10.1016/S0140-6736(07)60982-9.
- Background Feigin A, Kaplitt MG, Tang C, Lin T, Mattis P, Dhawan V, During MJ, Eidelberg D. Modulation of metabolic brain networks after subthalamic gene therapy for Parkinson's disease. Proc Natl Acad Sci U S A. 2007 Dec 4;104(49):19559-64. doi: 10.1073/pnas.0706006104. Epub 2007 Nov 27.
- Results LeWitt PA, Rezai AR, Leehey MA, Ojemann SG, Flaherty AW, Eskandar EN, Kostyk SK, Thomas K, Sarkar A, Siddiqui MS, Tatter SB, Schwalb JM, Poston KL, Henderson JM, Kurlan RM, Richard IH, Van Meter L, Sapan CV, During MJ, Kaplitt MG, Feigin A. AAV2-GAD gene therapy for advanced Parkinson's disease: a double-blind, sham-surgery controlled, randomised trial. Lancet Neurol. 2011 Apr;10(4):309-19. doi: 10.1016/S1474-4422(11)70039-4.
- Niethammer M, Tang CC, LeWitt PA, Rezai AR, Leehey MA, Ojemann SG, Flaherty AW, Eskandar EN, Kostyk SK, Sarkar A, Siddiqui MS, Tatter SB, Schwalb JM, Poston KL, Henderson JM, Kurlan RM, Richard IH, Sapan CV, Eidelberg D, During MJ, Kaplitt MG, Feigin A. Long-term follow-up of a randomized AAV2-GAD gene therapy trial for Parkinson's disease. JCI Insight. 2017 Apr 6;2(7):e90133. doi: 10.1172/jci.insight.90133.
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | AAV-GAD | Gene therapy (AAV / viral vector) | 1e+12 vg | Other |